OUT OF STOCK after my contract was sent.

Yesterday (26 Feb 2018) I called MTN for the third time to upgrade my contract. This is my first upgrade since i've been with MTN. The two calls prior was last week sometime, where I was told, they don't have stock and they will make contact with me once the stock is received. (This never happened) So yesterday i spoke to Glasson and she informed me that they do have stock available and it was under 20 minutes that my order was placed. I spoke to the ,lady and advised that last week i was informed that the deal i want would be about R420 which was the Lenovo Ideapad 320 and a portable wifi router/moderm. She raps off a few things and informs me that the only thing that she see in that price range is the B315S (i'm not aware of the model numbers until now). Today i receive my contract @ 09h19 and I take the model number of the wifi router and see that it's actually the one that is for home use. I then also received and sms from DSV informing me that they have received my package and will make contact for a delivery date ********** (very quick service) I then make contact with MTN direct the for the first time and inform them of the error, in order to avoid a up and down situation and was advised that the message will be sent through to Glasson. After an hour or so I call again, thinking that I need to speak to her before the package leaves from wherever it is. I again get told that and email was sent to Glasson and she will make contact with me in about 30 minutes. That time passes and no contact. I then called for the third time and spoke to another lady and asked for a manager, she explains that she needs get all information before hand over to a supervisor. I explain my case again for the third time and after all that she says that she will send and email to Glasson as she can see that my contract was cancelled by her and she is waiting for it to be reversed and will need to ,wait for stock before she can resend it. i asked her what does she mean wait for stock if my laptop was according to the message on my way to me and again I ask for a manager? She informs me that there is no stock and that all supervisor are in a meeting and that the manager is not in. She then tell me that she will escalate late this to the call centre where Glasson works and will ask them to give me a call. This is unacceptable that because the wifi device had to be changed, now there is no laptop in stock anymore. I request for a supervisor to call me before 17h00 as I am driving after that and will not be able to answer.